Pennsylvania offers more than just a glimpse into American history, it invites travelers to walk through it. In Philadelphia, the Liberty Bell still draws visitors from around the world, while Independence Hall, a UNESCO World Heritage Site, is where both the Declaration of Independence and the U.S. Constitution were debated and signed. Just a short walk away, modern museums like the National Constitution Center offer hands-on exhibits that connect the past to today’s civic questions.

Vis, a charming island city in Croatia's Dalmatian region, offers a serene retreat with its blend of historical allure and natural beauty. Known for its historical significance, Vis boasts remnants of its Greek and Roman past, including the well-preserved fortifications and ancient ruins. The city itself is a captivating blend of Venetian and Austro-Hungarian architecture, with quaint streets and lovely waterfronts that invite leisurely exploration.

Tucked away in the heart of the Pacific Ocean, Nauru is one of the world’s smallest and least visited countries being an island nation just 21 square kilometers in size, with a population under 10,000. But its compact size makes exploring simple and rewarding. Visitors can circle the entire island by car in under an hour, taking in stunning ocean views, remnants of World War II bunkers, and clusters of colorful homes that speak to Nauru's resilient spirit and layered past.

San Jose is the capital city of Costa Rica and is located in the province of San Jose, which is in the Central Valley. The city is surrounded by high green mountains. There are numerous museums as well as art galleries, theaters, exhibitions, parks and garden in the city. All regions in Costa Rica are accessible from the capital city of San Jose, which makes its an ideal starting point for touring the country.

ABERDEEN -- Scotland's third-largest city (pop. 187,000) is characterized by buildings of beautiful white granite. Set beside the North Sea, Aberdeen is both a university town and the capital of the Scottish oil boom. It is also one of Scotland's largest seaside resorts (though its appeal is confined to those who like their water well-chilled).